No mate I didn't misunderstand. This used to be a feature where when you came to a standstill the auto lock feature unlocked itself (a bit like taxis do now). It sounds like the doors are trying to unlock rather than lock again.
I have the feature enabled. When I drive off and exceed ~10mph, the doors lock. They don't unlock again until I manually pull on the interior door lever after I've stopped the car... or if for some reason if I pressed the unlock button on the door before opening the doors. They stay locked until I or a passenger manually intervenes, so once I hear the door locks "click" at the start of the trip, I don't hear them again until I'm getting out of the car.
In other words, I don't have the problem that the OP describes - if I understand correctly, his doors go into an endless cycle of trying to lock/unlock on the same journey without him doing anything other than slowing down below 10mph! This shouldn't happen.